| Original Articles |
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Thermal Hysteresis in La2/3 Ca1/3 MnO3 Films Grown on Tilted SrTiO3 Substrates and Influence of External Magnetic Field |
| GUAN Dong-Yi1;ZHOU Qing-Li1;ZHAO Kun1;SUN Jia-Xing2;JIN Kui-Juan1;CHEN Zheng-Hao1;LU Hui-Bin1;YANG Guo-Zhen1 |
| 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, PO Box 603, Beijing 100080
2Department of Physics, Liaoning University, Shenyang 110036 |
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| Cite this article: |
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GUAN Dong-Yi, ZHOU Qing-Li, ZHAO Kun et al 2006 Chin. Phys. Lett. 23 460-462 |
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Abstract Thermal hysteresis in the resistivity of La2/3Ca1/3MnO3 thin films grown on tilted SrTiO3 substrates is simulated by using the random network model on the basis of mixed-phase percolation between metallic and insulating domains. The metallic-insulating transition temperatures during the warming process are lower than those during the cooling process due to the difference in fraction of metallic domains between warming and cooling process. With an external magnetic field, the metallic--insulating transition temperatures shift to a higher value and the resistivities are reduced. The excellent agreement between the simulation and the experimental data further verifies that phase separation plays a crucial role in the transport process of La2/3Ca1/3MnO3 thin films.
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| Keywords:
75.60.Nt
64.75.+g
71.30.+h
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Published: 01 February 2006
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| PACS: |
75.60.Nt
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(Magnetic annealing and temperature-hysteresis effects)
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64.75.+g
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71.30.+h
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(Metal-insulator transitions and other electronic transitions)
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